package com.Lottry.query.controllers;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.Lottry.query.GuidePageAdapter;

import java.util.ArrayList;
import java.util.List;

import xiaodou.colorgame.R;
import xiaodou.colorgame.SplashActivity;

public class UserGuidingActivity extends Activity implements ViewPager.OnPageChangeListener
{
    private ViewPager vp;
    private int []imageIdArray;
    private List<View> viewList;
    private ViewGroup vg;
    private ImageView ivPoint;
    private ImageView []ivPointArray;
    private TextView ibStart;
    private LinearLayout.LayoutParams layoutParams;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_user_guiding);
        ibStart = (TextView) findViewById(R.id.guide_ib_start);
        ibStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(UserGuidingActivity.this, SplashActivity.class));
                finish();
            }
        });

        //加载ViewPager
        initViewPager();

        //加载底部圆点
        initPoint();
    }

    private void initPoint() {
        //这里实例化LinearLayout
        vg = (ViewGroup) findViewById(R.id.guide_ll_point);
        //根据ViewPager的item数量实例化数组
        ivPointArray = new ImageView[viewList.size()];
        //循环新建底部圆点ImageView，将生成的ImageView保存到数组中
        int size = viewList.size();
        for (int i = 0;i<size;i++){
            ivPoint = new ImageView(this);
            layoutParams = new LinearLayout.LayoutParams(15,15);

            //第一个页面需要设置为选中状态，这里采用两张不同的图片
            if (i == 0){
                ivPoint.setBackgroundResource(R.mipmap.ic_carouseldiagram_point_selected);
            }else{
                layoutParams.leftMargin=20;
                ivPoint.setBackgroundResource(R.mipmap.ic_carouseldiagram_point_unselected);
            }
            ivPoint.setLayoutParams(layoutParams);
            ivPoint.setPadding(30, 0, 30, 0);//left,top,right,bottom
            ivPointArray[i] = ivPoint;

            //将数组中的ImageView加入到ViewGroup
            vg.addView(ivPointArray[i]);
        }
    }

    private void initViewPager() {
        vp = (ViewPager) findViewById(R.id.guide_vp);
        //实例化图片资源
        imageIdArray = new int[]{R.mipmap.ic_guide_1,R.mipmap.ic_guide_2};
        viewList = new ArrayList<>();
        //获取一个Layout参数，设置为全屏
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT);

        //循环创建View并加入到集合中
        int len = imageIdArray.length;
        for (int i = 0;i<len;i++){
            //new ImageView并设置全屏和图片资源
            ImageView imageView = new ImageView(this);
            imageView.setLayoutParams(params);
            imageView.setBackgroundResource(imageIdArray[i]);

            //将ImageView加入到集合中
            viewList.add(imageView);
        }

        //View集合初始化好后，设置Adapter
        vp.setAdapter(new GuidePageAdapter(viewList));
        //设置滑动监听
        vp.setOnPageChangeListener(this);
    }


    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

    }

    @Override
    public void onPageSelected(int position) {
        //循环设置当前页的标记图
        int length = imageIdArray.length;
        for (int i = 0;i<length;i++){
            ivPointArray[position].setBackgroundResource(R.mipmap.ic_carouseldiagram_point_selected);
            if (position != i){
                ivPointArray[i].setBackgroundResource(R.mipmap.ic_carouseldiagram_point_unselected);
            }
        }

        //判断是否是最后一页，若是则显示按钮
        if (position == imageIdArray.length - 1){
            ibStart.setVisibility(View.VISIBLE);
        }else {
            ibStart.setVisibility(View.GONE);
        }
    }
    @Override
    public void onPageScrollStateChanged(int state) {

    }
}
